This is due to http://trac.webkit.org/changeset/48884 which changed the parameters for a base class. There was a partial fix in http://trac.webkit.org/changeset/48904 but it missed a method. This currently causes worker-script-error.html to fail for users of v8.
Created attachment 40967 [details] Unreviewed build fix for Windows (Cairo).
Comment on attachment 40967 [details] Unreviewed build fix for Windows (Cairo). Whoops... new tool problem.
Created attachment 40968 [details] Fix bug.
Comment on attachment 40968 [details] Fix bug. I guess v8 doesn't want to use the new param? :) rs=me.
Committed as http://trac.webkit.org/changeset/49408